Energy levels of ${}_{}{}^{241}{}_{}{}^{}\mathrm{Pu}$ have been studied through the ${}_{}{}^{242}{}_{}{}^{}\mathrm{Pu}(d,t)$ and ${}_{}{}^{242}{}_{}{}^{}\mathrm{Pu}({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha )$ reactions induced by 17-MeV deuterons and 30-MeV ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ particles, respectively. Transferred orbital angular momenta are obtained from (${}_{}{}^3{}_{}{}^{}\mathrm{He}$, $\alpha$) angular distributions and from cross-section ratios $R=\frac{d\sigma ({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha )}{d\sigma \mathrm{}(d,t)\mathrm{}}$. The ratios $R$ vary by a factor of ${10}^3$ for a change in $l$ from 0 to 7 and provide a very sensitive measure of the angular momentum transfer. Experimentally measured spectroscopic factors are found to be in reasonable agreement with those calculated from Nilsson wave functions. Rotational bands associated with the following Nilsson configurations are identified in ${}_{}{}^{241}{}_{}{}^{}\mathrm{Pu}: {\frac{5}{2}}^{+}\mathrm{}\left[622\right]\mathrm{}$, ${\frac{7}{2}}^{+}\mathrm{}\left[624\right]\mathrm{}$, ${\frac{1}{2}}^{+}\mathrm{}\left[631\right]\mathrm{}$, ${\frac{7}{2}}^{-}\mathrm{}\left[743\right]\mathrm{}$, ${\frac{3}{2}}^{+}\mathrm{}\left[631\right]\mathrm{}$, ${\frac{1}{2}}^{-}\mathrm{}\left[501\right]\mathrm{}$, and ${\frac{5}{2}}^{-}\mathrm{}\left[752\right]\mathrm{}$.

• Received 28 August 1970

DOI:https://doi.org/10.1103/PhysRevC.3.234